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1 .. SPDX-License-Identifier: GPL-2.0
9 1) This file is a supplement to arcnet.txt. Please read that for general
11 2) This file is no longer Linux-specific. It should probably be moved out
14 Because so many people (myself included) seem to have obtained ARCnet cards
15 without manuals, this file contains a quick introduction to ARCnet hardware,
17 e-mail apenwarr@worldvisions.ca with any settings for your particular card,
21 Introduction to ARCnet
24 ARCnet is a network type which works in a way similar to popular Ethernet
31 100 Mbps card to a 2.5 Mbps card, and so on. From what I hear, my driver does
32 work with 100 Mbps cards, but I haven't been able to verify this myself,
33 since I only have the 2.5 Mbps variety. It is probably not going to saturate
36 You also cannot connect an ARCnet card to any kind of Ethernet card and
37 expect it to work.
39 There are two "types" of ARCnet - STAR topology and BUS topology. This
40 refers to how the cards are meant to be wired together. According to most
41 available documentation, you can only connect STAR cards to STAR cards and
42 BUS cards to BUS cards. That makes sense, right? Well, it's not quite
46 well-designed standard. It uses something called "modified token passing"
47 which makes it completely incompatible with so-called "Token Ring" cards,
61 completely different programming interface, leading to a lot of different,
63 programming interface also means that when high-performance hardware
64 facilities like PCI bus mastering DMA appear, it's hard to take advantage of
67 One thing that makes ARCnet cards difficult to program for, however, is the
69 up to 508 bytes in length. This is smaller than the Internet "bare minimum"
70 of 576 bytes, let alone the Ethernet MTU of 1500. To compensate, an extra
72 splitting," that allows "virtual packets" to grow as large as 64K each,
73 although they are generally kept down to the Ethernet-style 1500 bytes.
91 - Avery Pennraun <apenwarr@worldvisions.ca>
92 - Stephen A. Wood <saw@hallc1.cebaf.gov>
93 - John Paul Morrison <jmorriso@bogomips.ee.ubc.ca>
94 - Joachim Koenig <jojo@repas.de>
99 types of cabling: coax and twisted pair. The other ARCnet-type networks
100 (100 Mbps TCNS and 320 kbps - 32 Mbps ARCnet Plus) use different types of
103 For a coax network, you "should" use 93 Ohm RG-62 cable. But other cables
111 equal to a high impedance one with a terminator installed.
114 are two types of hubs - active and passive. Passive hubs are small boxes
119 -R-+-R- R 47 Ohm resistors
124 they are powered and contain electronics to amplify the signal and send it
125 to other segments of the net. They usually have eight connectors. Active
126 hubs come in two variants - dumb and smart. The dumb variant just
127 amplifies, but the smart one decodes to digital and encodes back all packets
131 And now to the cabling. What you can connect together:
133 1. A card to a card. This is the simplest way of creating a 2-computer
136 2. A card to a passive hub. Remember that all unused connectors on the hub
143 3. A card to an active hub. Here is no need to terminate the unused
148 4. An active hub to another.
150 5. An active hub to passive hub.
153 implied by such a connection is too high for the net to operate reliably.
157 R S - STAR type card
158 S------H--------A-------S R - Terminator
159 | | H - Hub
160 | | A - Active hub
161 | S----H----S
166 The BUS topology is very similar to the one used by Ethernet. The only
168 uses 50 Ohm impedance. You use T connectors to put the computers on a single
169 line of cable, the bus. You have to put terminators at both ends of the
172 RT----T------T------T------T------TR
175 B - BUS type card
176 R - Terminator
177 T - T connector
179 But that is not all! The two types can be connected together. According to
183 A------T------T------TR
185 S---H---S
192 S------T------T------S
195 But, according to my own experiments, you can simply hang a BUS type card
196 anywhere in middle of a cable in a STAR topology network. And more - you
203 RT------T-------T------H------S
206 S------A------T-------T-------A-------H------TR
209 | | | S----A-----S
210 S------H---A----S | |
211 | | S------T----H---S |
215 of the TP cards has two RJ (phone-cord style) connectors. The cards are
216 then daisy-chained together using a cable connecting every two neighboring
228 involved in using them; you just connect a TP chain to a hub on any end or
233 RP-------P--------P--------H-----P------P-----PR
235 RP-----H--------P--------H-----P------PR
239 R - RJ Terminator
240 P - TP Card
241 H - TP Hub
248 RG-62 93 Ohm up to 650 m
249 RG-59/U 75 Ohm up to 457 m
250 RG-11/U 75 Ohm up to 533 m
251 IBM Type 1 150 Ohm up to 200 m
252 IBM Type 3 100 Ohm up to 100 m
255 The maximum length of all cables connected to a passive hub is limited to 65
256 meters for RG-62 cabling; less for others. You can see that using passive
258 Trunk" is about 300 meters for RG-62. The maximum distance between the two
259 most distant points of the net is limited to 3000 meters. The maximum length
268 - the I/O address: this is the "port" your ARCnet card is on. Probed
271 should not be the same as any other device on your system. According to
277 - Avery's favourite: 0x300.
279 - the IRQ: on 8-bit cards, it might be 2 (9), 3, 4, 5, or 7.
280 on 16-bit cards, it might be 2 (9), 3, 4, 5, 7, or 10-15.
288 ("Not on bus" means there is no way for a card to generate this
293 IRQ 1 Keyboard (Not on bus)
322 is a jumper), one solution would be to clip the printed circuit
326 - Avery's favourite: IRQ2 (actually IRQ9). Watch that VGA, though.
328 - the memory address: Unlike most cards, ARCnets use "shared memory" for
334 A0000 - VGA graphics memory (ok if you don't have VGA)
335 B0000 - Monochrome text mode
336 C0000 \ One of these is your VGA BIOS - usually C0000.
338 F0000 - System BIOS
343 - Avery's favourite: 0xD0000
345 - the station address: Every ARCnet card has its own "unique" network
346 address from 0 to 255. Unlike Ethernet, you can set this address
354 - Avery's favourite: 3 and 4. Not that it matters.
356 - There may be ETS1 and ETS2 settings. These may or may not make a
358 used to change the delays used when powering up a computer on the
374 Make sure you set ETS1 and ETS2 to the SAME VALUE for all cards on your
387 ON ON Normal state - everything OK, nothing
396 huge amounts of duplicated information. I have no time to fix it. If you
397 want to, PLEASE DO! Just send me a 'diff -u' of all your changes.
400 able to use your text viewer's "search" function to find the entry you want.
402 various diagrams to see if you can tell.
405 tell me. I had to figure mine out without the manual, and it WASN'T FUN!
408 model that is, please e-mail me to say so.
425 SMC? LCS-8830(-T) 8/16
427 CNet Tech CN120-Series 8
428 CNet Tech CN160-Series 16
430 Acer 5210-003 8
431 Datapoint? LAN-ARC-8 8
432 Topware TA-ARC/10 8
433 Thomas-Conrad 500-6242-0097 REV A 8
435 No Name -- 8/16
448 - Please send any other information you can find.
450 - And some other stuff (more info is welcome!)::
453 To: apenwarr@foxnet.net (Avery Pennarun)
455 Reply-To: timoh@xs4all.nl
460 cable-connector and it's for changing to star or bus topology;
461 closed: star - open: bus
462 On the PC500 are some more jumper-pins, one block labeled with RX,PDN,TXI
467 --- CUT ---
472 PC100, PC110, PC120, PC130 (8-bit cards) and PC500, PC600 (16-bit cards)
473 ------------------------------------------------------------------------
475 - mainly from Avery Pennarun <apenwarr@worldvisions.ca>. Values depicted
477 - special thanks to Timo Hilbrink <timoh@xs4all.nl> for noting that PC120,
480 - PC110 settings were verified by Stephen A. Wood <saw@cebaf.gov>
481 - Also, the JP- and S-numbers probably don't match your card exactly. Try
482 to find jumpers/switches with the same number of settings - it's
492 1 2 3 4 5 6 7 8 9 10
493 S1 /----------------------------------\
494 (I/O and Memory | 1 1 * 0 0 0 0 * 1 1 0 1 |
495 addresses) \----------------------------------/
496 |--| |--------| |--------|
500 you're holding the card, and which way you think is '1'!
508 ------- -----
510 01 1
516 ------- -----
518 0001 1
532 ------- -----
534 0001 1
543 DO NOT SET THIS TO C0000, F0000, OR LESS THAN A0000!
545 1 2 3 4 5 6 7 8
546 S2 /--------------------------\
547 (Station Address) | 1 1 0 0 0 0 0 0 |
548 \--------------------------/
551 ------- -----
561 DO NOT SET THIS TO 0 OR 255 (0xFF)!
564 PC130E/PC270E (8-bit cards)
565 ---------------------------
567 - from Juergen Seifert <seifert@htwm.de>
572 "Configuration Guide for ARCNET(R)-PC130E/PC270 Network
579 standard BNC female connector for connection to RG-62/U coax cable.
580 Since this board is designed both for point-to-point connection in star
581 networks and for connection to bus networks, it is downwardly compatible
587 modular RJ11-type jacks for connection to twisted pair wiring.
588 It can be used in a star or a daisy-chained network.
592 8 7 6 5 4 3 2 1
608 | |oo| ROM | 90C63 | r |___| 1
621 S1 1-3: I/O Base Address Select
622 4-6: Memory Base Address Select
623 7-8: RAM Offset Select
624 S2 1-8: Node ID Select
627 STAR Selected - Star Topology (PC130E only)
628 Deselected - Bus Topology (PC130E only)
631 J1 6-position Telephone Jack (PC270E only)
632 J2 6-position Telephone Jack (PC270E only)
634 Setting one of the switches to Off/Open means "1", On/Closed means "0".
640 The eight switches in group S2 are used to set the node ID.
641 These switches work in a way similar to the PC100-series cards; see that
648 The first three switches in switch group S1 are used to select one
653 1 2 3 | Address
654 -------|--------
656 0 0 1 | 290
657 0 1 0 | 2E0 (Manufacturer's default)
658 0 1 1 | 2F0
659 1 0 0 | 300
660 1 0 1 | 350
661 1 1 0 | 380
662 1 1 1 | 3E0
670 Switches 4-6 of switch group S1 select the Base of the 16K block.
678 -----------|---------|-----------
680 0 0 0 0 1 | C0800 | C2000
681 0 0 0 1 0 | C1000 | C2000
682 0 0 0 1 1 | C1800 | C2000
684 0 0 1 0 0 | C4000 | C6000
685 0 0 1 0 1 | C4800 | C6000
686 0 0 1 1 0 | C5000 | C6000
687 0 0 1 1 1 | C5800 | C6000
689 0 1 0 0 0 | CC000 | CE000
690 0 1 0 0 1 | CC800 | CE000
691 0 1 0 1 0 | CD000 | CE000
692 0 1 0 1 1 | CD800 | CE000
694 0 1 1 0 0 | D0000 | D2000 (Manufacturer's default)
695 0 1 1 0 1 | D0800 | D2000
696 0 1 1 1 0 | D1000 | D2000
697 0 1 1 1 1 | D1800 | D2000
699 1 0 0 0 0 | D4000 | D6000
700 1 0 0 0 1 | D4800 | D6000
701 1 0 0 1 0 | D5000 | D6000
702 1 0 0 1 1 | D5800 | D6000
704 1 0 1 0 0 | D8000 | DA000
705 1 0 1 0 1 | D8800 | DA000
706 1 0 1 1 0 | D9000 | DA000
707 1 0 1 1 1 | D9800 | DA000
709 1 1 0 0 0 | DC000 | DE000
710 1 1 0 0 1 | DC800 | DE000
711 1 1 0 1 0 | DD000 | DE000
712 1 1 0 1 1 | DD800 | DE000
714 1 1 1 0 0 | E0000 | E2000
715 1 1 1 0 1 | E0800 | E2000
716 1 1 1 1 0 | E1000 | E2000
717 1 1 1 1 1 | E1800 | E2000
719 *) To enable the 8K Boot PROM install the jumper ROM.
726 The jumpers labeled EXT1 and EXT2 are used to determine the timeout
729 To select a hardware interrupt level set one (only one!) of the jumpers
736 The single jumper labeled STAR is used to configure the PC130E board for
750 -------|------------------- ---------|-------------------
757 PC500/PC550 Longboard (16-bit cards)
758 ------------------------------------
760 - from Juergen Seifert <seifert@htwm.de>
766 is different in hard- and software! The most important differences
769 - The long board has no Shared memory.
770 - On the long board the selection of the interrupt is done by binary
773 [Avery's note: pay special attention to that: the long board HAS NO SHARED
774 MEMORY. This means the current Linux-ARCnet driver can't use these cards.
776 the future, but don't hold your breath. Thanks again to Juergen Seifert for
782 "Configuration Guide for SMC ARCNET-PC500/PC550
790 to RG-62/U coax cable.
791 The board is designed both for point-to-point connection in star networks
792 and for connection to bus networks.
794 The PC550 is equipped with two modular RJ11-type jacks for connection
795 to twisted pair wiring.
796 It can be used in a star or a daisy-chained (BUS) network.
800 1
801 0 9 8 7 6 5 4 3 2 1 6 5 4 3 2 1
817 < r |___| 1
820 > 3 1 JP6 |_____|
829 SW1 1-6: I/O Base Address Select
830 7-10: Interrupt Select
831 SW2 1-6: Reserved for Future Use
832 SW3 1-8: Node ID Select
833 JP2 1-4: Extended Timeout Select
834 JP6 Selected - Star Topology (PC500 only)
835 Deselected - Bus Topology (PC500 only)
839 J1 6-position Telephone Jack (PC550 only)
840 J2 6-position Telephone Jack (PC550 only)
842 Setting one of the switches to Off/Open means "1", On/Closed means "0".
848 The eight switches in group SW3 are used to set the node ID. Each node
849 attached to the network must have an unique node ID which must be
851 Switch 1 serves as the least significant bit (LSB).
853 The node ID is the sum of the values of all switches set to "1"
857 -------|-------
858 1 | 1
870 8 7 6 5 4 3 2 1 | Node ID | Node ID
871 ----------------|---------|---------
873 0 0 0 0 0 0 0 1 | 1 | 1
874 0 0 0 0 0 0 1 0 | 2 | 2
875 0 0 0 0 0 0 1 1 | 3 | 3
877 0 1 0 1 0 1 0 1 | 55 | 85
879 1 0 1 0 1 0 1 0 | AA | 170
881 1 1 1 1 1 1 0 1 | FD | 253
882 1 1 1 1 1 1 1 0 | FE | 254
883 1 1 1 1 1 1 1 1 | FF | 255
889 The first six switches in switch group SW1 are used to select one
893 6 5 4 3 2 1 | Address
894 -------------|--------
895 0 1 0 0 0 0 | 200
896 0 1 0 0 0 1 | 210
897 0 1 0 0 1 0 | 220
898 0 1 0 0 1 1 | 230
899 0 1 0 1 0 0 | 240
900 0 1 0 1 0 1 | 250
901 0 1 0 1 1 0 | 260
902 0 1 0 1 1 1 | 270
903 0 1 1 0 0 0 | 280
904 0 1 1 0 0 1 | 290
905 0 1 1 0 1 0 | 2A0
906 0 1 1 0 1 1 | 2B0
907 0 1 1 1 0 0 | 2C0
908 0 1 1 1 0 1 | 2D0
909 0 1 1 1 1 0 | 2E0 (Manufacturer's default)
910 0 1 1 1 1 1 | 2F0
911 1 1 0 0 0 0 | 300
912 1 1 0 0 0 1 | 310
913 1 1 0 0 1 0 | 320
914 1 1 0 0 1 1 | 330
915 1 1 0 1 0 0 | 340
916 1 1 0 1 0 1 | 350
917 1 1 0 1 1 0 | 360
918 1 1 0 1 1 1 | 370
919 1 1 1 0 0 0 | 380
920 1 1 1 0 0 1 | 390
921 1 1 1 0 1 0 | 3A0
922 1 1 1 0 1 1 | 3B0
923 1 1 1 1 0 0 | 3C0
924 1 1 1 1 0 1 | 3D0
925 1 1 1 1 1 0 | 3E0
926 1 1 1 1 1 1 | 3F0
932 Switches seven through ten of switch group SW1 are used to select the
934 from 0 to 15 would be possible, but only the following eight values will
941 ---------|--------
942 0 0 1 1 | 3
943 0 1 0 0 | 4
944 0 1 0 1 | 5
945 0 1 1 1 | 7
946 1 0 0 1 | 9 (=2) (default)
947 1 0 1 0 | 10
948 1 0 1 1 | 11
949 1 1 0 0 | 12
955 The two jumpers JP2 (1-4) are used to determine the timeout parameters.
957 Refer to the COM9026 Data Sheet for alternate configurations.
963 The single jumper labeled JP6 is used to configure the PC500 board for
977 -------|------------------- ---------|-------------------
984 PC710 (8-bit card)
985 ------------------
987 - from J.S. van Oosten <jvoosten@compiler.tdcnet.nl>
996 | +---------+ +---------+ |____
998 | +---------+ +---------+ |
1001 | | R | | | X-tal ###___
1006 | .. JP1 +----------+ |
1010 | .. +----------+ |
1011 ------- -----------
1015 labelled) the same as on the PC270, from top to bottom: EXT2, EXT1, ROM,
1016 IRQ7, IRQ5, IRQ4, IRQ3, IRQ2 (gee, wonder what they would do? :-) )
1019 are swapped (S1 is the nodeaddress, S2 sets IO- and RAM-address).
1021 I know it works when connected to a PC110 type ARCnet board.
1029 LCS-8830(-T) (8 and 16-bit cards)
1030 ---------------------------------
1032 - from Mathias Katzer <mkatzer@HRZ.Uni-Bielefeld.DE>
1033 - Marek Michalkiewicz <marekm@i17linuxb.ists.pwr.wroc.pl> says the
1034 LCS-8830 is slightly different from LCS-8830-T. These are 8 bit, BUS
1037 This is a LCS-8830-T made by SMC, I think ('SMC' only appears on one PLCC,
1040 SMC ARCnet Board Type LCS-8830-T::
1042 ------------------------------------
1048 | U3 SW 1 JP0 ###| Phone Jacks
1049 | -- ###|
1054 | -- ##### #### BNC Connector
1058 -- -------
1060 --------------------------
1063 SW1: DIP-Switches for Station Address
1064 SW2: DIP-Switches for Memory Base and I/O Base addresses
1068 JP2: Boot-ROM enabled if closed
1071 U3: Boot-ROM Socket
1083 (DIP-Switch downwards means "0")
1085 The station address is binary-coded with SW1.
1087 The I/O base address is coded with DIP-Switches 6,7 and 8 of SW2:
1093 000 260-26f
1094 100 290-29f
1095 010 2e0-2ef
1096 110 2f0-2ff
1097 001 300-30f
1098 101 350-35f
1099 011 380-38f
1100 111 3e0-3ef
1104 DIP Switches 1-5 of SW2 encode the RAM and ROM Address Range:
1110 00000 C:0000-C:07ff C:2000-C:3fff
1111 10000 C:0800-C:0fff
1112 01000 C:1000-C:17ff
1113 11000 C:1800-C:1fff
1114 00100 C:4000-C:47ff C:6000-C:7fff
1115 10100 C:4800-C:4fff
1116 01100 C:5000-C:57ff
1117 11100 C:5800-C:5fff
1118 00010 C:C000-C:C7ff C:E000-C:ffff
1119 10010 C:C800-C:Cfff
1120 01010 C:D000-C:D7ff
1121 11010 C:D800-C:Dfff
1122 00110 D:0000-D:07ff D:2000-D:3fff
1123 10110 D:0800-D:0fff
1124 01110 D:1000-D:17ff
1125 11110 D:1800-D:1fff
1126 00001 D:4000-D:47ff D:6000-D:7fff
1127 10001 D:4800-D:4fff
1128 01001 D:5000-D:57ff
1129 11001 D:5800-D:5fff
1130 00101 D:8000-D:87ff D:A000-D:bfff
1131 10101 D:8800-D:8fff
1132 01101 D:9000-D:97ff
1133 11101 D:9800-D:9fff
1134 00011 D:C000-D:c7ff D:E000-D:ffff
1135 10011 D:C800-D:cfff
1136 01011 D:D000-D:d7ff
1137 11011 D:D800-D:dfff
1138 00111 E:0000-E:07ff E:2000-E:3fff
1139 10111 E:0800-E:0fff
1140 01111 E:1000-E:17ff
1141 11111 E:1800-E:1fff
1148 PDI507 (8-bit card)
1149 --------------------
1151 - from Mark Rejhon <mdrejhon@magi.com> (slight modifications by Avery)
1152 - Avery's note: I think PDI508 cards (but definitely NOT PDI508Plus cards)
1153 are mostly the same as this. PDI508Plus cards appear to be mainly
1154 software-configured.
1169 There is a two-jumper array for J3. I don't know what it is for,
1171 a six pin grid in a two-by-three fashion. The jumpers were
1174 .-------.
1176 :-------: ------> Accessible end of card with connectors
1177 o | o o | in this direction ------->
1178 `-------'
1184 .-------.
1186 :-------: TWIST Technology
1188 `-------'
1189 .-------.
1191 :-------: COAX Technology
1193 `-------'
1195 - If using coax cable in a bus topology the J4 jumper must be removed;
1198 - If using bus topology with twisted pair wiring move the J3
1199 jumpers so they connect the middle pin and the pins closest to the RJ11
1203 - If using star topology with twisted pair wiring move the J3
1204 jumpers so they connect the middle pin and the pins closest to the RJ11
1211 it is installed, is used to set the ARCnet address. There are 8
1212 switches. Use an address from 1 to 254
1223 11111110 1
1228 card. There are five labelled MS0-MS4 which seem to control the
1229 memory address, and another three labelled IO0-IO2 which seem to
1232 This was difficult to test by trial and error, and the I/O addresses
1234 rebooting the computer, and attempting to load ARCETHER at various
1236 the red transmit LED to blink, is the one that I thought works.
1238 Also, the address 0x3D0 seem to have a special meaning, since the
1260 0xD000, it will use up addresses 0xD000 to 0xD100.
1263 and using LOADHI to see what address automatically became excluded
1264 from the upper memory regions, and then attempting to load ARCETHER
1272 Memory Switch 0 (MS0) didn't seem to work properly when set to OFF
1274 it ON first, and if it doesn't work, set it to OFF. (It may be a
1281 00001 0xE100 (guessed - was not detected by QEMM)
1282 00011 0xE000 (guessed - was not detected by QEMM)
1293 11001 0xC900 (guessed - crashes tested system)
1294 11011 0xC800 (guessed - crashes tested system)
1295 11101 0xC500 (guessed - crashes tested system)
1296 11111 0xC400 (guessed - crashes tested system)
1299 CNet Technology Inc. (8-bit cards)
1302 120 Series (8-bit cards)
1303 ------------------------
1304 - from Juergen Seifert <seifert@htwm.de>
1315 P/N:12-01-0007
1320 - P/N 120A ARCNET 8 bit XT/AT Star
1321 - P/N 120AB ARCNET 8 bit XT/AT Bus
1322 - P/N 120TP ARCNET 8 bit XT/AT Twisted Pair
1323 - P/N 120ST ARCNET 8 bit XT/AT Star, Twisted Pair
1324 - P/N 120SBT ARCNET 8 bit XT/AT Star, Bus, Twisted Pair
1339 | | | 1 2 3 4 5 6 7 8 d | | ID1
1344 | |o|o| |oo| | | JP 1 1 1 | |
1345 | ______________ | | 0 1 2 |____|
1356 S1 1-5: Base Memory Address Select
1357 6-8: Base I/O Address Select
1358 S2 1-8: Node ID Select (ID0-ID7)
1369 J2 Two 6-position Telephone Jack (CN120TP/ST/SBT only)
1371 Setting one of the switches to Off means "1", On means "0".
1377 The eight switches in SW2 are used to set the node ID. Each node attached
1378 to the network must have an unique node ID which must be different from 0.
1379 Switch 1 (ID0) serves as the least significant bit (LSB).
1381 The node ID is the sum of the values of all switches set to "1"
1387 1 ID0 1
1400 8 7 6 5 4 3 2 1 | Node ID | Node ID
1401 ----------------|---------|---------
1403 0 0 0 0 0 0 0 1 | 1 | 1
1404 0 0 0 0 0 0 1 0 | 2 | 2
1405 0 0 0 0 0 0 1 1 | 3 | 3
1407 0 1 0 1 0 1 0 1 | 55 | 85
1409 1 0 1 0 1 0 1 0 | AA | 170
1411 1 1 1 1 1 1 0 1 | FD | 253
1412 1 1 1 1 1 1 1 0 | FE | 254
1413 1 1 1 1 1 1 1 1 | FF | 255
1419 The last three switches in switch block SW1 are used to select one
1425 ------------|--------
1442 Switches 1-5 of switch block SW1 select the Memory Base address.
1447 1 2 3 4 5 | Address | Address *)
1448 --------------------|---------|-----------
1458 *) To enable the Boot ROM install the jumper JP1
1462 Since the switches 1 and 2 are always set to ON it may be possible
1463 that they can be used to add an offset of 2K, 4K or 6K to the base
1471 To select a hardware interrupt level install one (only one!) of the jumpers
1475 -------|-----
1486 The jumper JP12 is used to enable the internal terminator::
1488 -----
1490 ----- ON | | ON
1492 | | OFF ----- OFF
1494 -----
1505 ----- -----
1507 ----- ----- | | | |
1509 | | | | ----- -----
1511 ----- -----
1519 The jumpers labeled EXT1 and EXT2 are used to determine the timeout
1523 CNet Technology Inc. (16-bit cards)
1526 160 Series (16-bit cards)
1527 -------------------------
1528 - from Juergen Seifert <seifert@htwm.de>
1535 P/N:12-01-0006 Revision 3.00"
1539 - P/N 160A ARCNET 16 bit XT/AT Star
1540 - P/N 160AB ARCNET 16 bit XT/AT Bus
1541 - P/N 160TP ARCNET 16 bit XT/AT Twisted Pair
1551 > 1 o | | ID6
1552 < 1 2 3 4 5 6 7 8 9 0 d | S | ID5
1556 < |_______________| | IO-Base | MEM | d | | ID1
1563 > 1 1 1 1 |
1564 < 3 4 5 6 7 JP 8 9 0 1 2 3 |
1573 SW1 1-6: Base I/O Address Select
1574 7-10: Base Memory Address Select
1575 SW2 1-8: Node ID Select (ID0-ID7)
1577 JP3-JP13 Interrupt Select
1579 J1 Two 6-position Telephone Jack (CN160TP only)
1582 Setting one of the switches to Off means "1", On means "0".
1588 The eight switches in SW2 are used to set the node ID. Each node attached
1589 to the network must have an unique node ID which must be different from 0.
1590 Switch 1 (ID0) serves as the least significant bit (LSB).
1592 The node ID is the sum of the values of all switches set to "1"
1596 -------|-------|-------
1597 1 | ID0 | 1
1609 8 7 6 5 4 3 2 1 | Node ID | Node ID
1610 ----------------|---------|---------
1612 0 0 0 0 0 0 0 1 | 1 | 1
1613 0 0 0 0 0 0 1 0 | 2 | 2
1614 0 0 0 0 0 0 1 1 | 3 | 3
1616 0 1 0 1 0 1 0 1 | 55 | 85
1618 1 0 1 0 1 0 1 0 | AA | 170
1620 1 1 1 1 1 1 0 1 | FD | 253
1621 1 1 1 1 1 1 1 0 | FE | 254
1622 1 1 1 1 1 1 1 1 | FF | 255
1628 The first six switches in switch block SW1 are used to select the I/O Base
1632 1 2 3 4 5 6 | Address
1633 ------------------------|--------
1643 Note: Other IO-Base addresses seem to be selectable, but only the above
1650 The switches 7-10 of switch block SW1 are used to select the Memory
1655 ----------------|---------|-----------
1662 Other MEM-Base addresses seem to be selectable, but only the above
1669 To select a hardware interrupt level install one (only one!) of the jumpers
1673 -------|-----------------
1688 - Do not use JP11=IRQ6, it may conflict with your Floppy Disk
1690 - Use JP3=IRQ14 only, if you don't have an IDE-, MFM-, or RLL-
1695 ------------------------------
1697 The jumpers labeled JP1 and JP2 are used to determine the timeout
1704 8-bit card, unknown model
1705 -------------------------
1706 - from Vlad Lungu <vlungu@ugal.ro> - his e-mail address seemed broken at
1707 the time I tried to reach him. Sorry Vlad, if you didn't get my reply.
1712 | 1 8 |
1720 | | | |__| 1
1738 SW 1 : Shared Memory Address and I/O Base
1745 -----|--------------
1757 used a memory dump in DOS to identify them. For the 00000 configuration and
1758 some others that I didn't write here the card seems to conflict with the
1759 video card (an S3 GENDAC). I leave the full decoding of those addresses to
1765 ---|------------
1777 JP 4 : Boot PROM enable CLOSE - enabled
1778 OPEN - disabled
1780 JP 6 : IRQ set (ONLY ONE jumper on 1-5 for IRQ 2-6)
1786 8-bit card, Model 5210-003
1787 --------------------------
1789 - from Vojtech Pavlik <vojtech@suse.cz> using portions of the existing
1790 arcnet-hardware file.
1792 This is a 90C26 based card. Its configuration seems similar to the SMC
1835 | |___|1 |
1841 | |___|1 |
1850 SW1 1-6 Base I/O Address Select
1851 7-10 Memory Address Select
1852 SW2 1-8 Node ID Select (ID0-ID7)
1853 J1-J5 IRQ Select
1854 J6-J21 Unknown (Probably extra timeouts & ROM enable ...)
1865 The eight switches in SW2 are used to set the node ID. Each node attached
1866 to the network must have an unique node ID which must not be 0.
1867 Switch 1 (ID0) serves as the least significant bit (LSB).
1869 Setting one of the switches to OFF means "1", ON means "0".
1871 The node ID is the sum of the values of all switches set to "1"
1875 -------|-------
1876 1 | 1
1885 Don't set this to 0 or 255; these values are reserved.
1891 The switches 1 to 6 of switch block SW1 are used to select one
1896 -------|-------
1897 1 | 200
1904 The I/O address is sum of all switches set to "1". Remember that
1906 switch 1 should be ALWAYS SET TO OFF.
1914 A0000 are likely to cause system hang because there's main RAM.
1916 Jumpers 7-10 of switch block SW1 select the Memory Base address::
1920 ----------------|---------
1932 Jumpers 1-5 of the jumper block J1 control the IRQ level. ON means
1936 1 2 3 4 5 |
1937 ----------------------------
1949 jumpers and maybe one of J18-J21 selects ROM. Also J6-J10 and
1950 J11-J15 are connecting IRQ2-7 to some pins on the UFSs. I can't
1956 LAN-ARC-8, an 8-bit card
1957 ------------------------
1959 - from Vojtech Pavlik <vojtech@suse.cz>
1961 This is another SMC 90C65-based ARCnet card. I couldn't identify the
1971 | _____________ 1 ______ 8 | | 8
1975 | _________|_____ y | |___| 1
1983 | 1 8 | | | |___
1995 SW1 1-5: Base Memory Address Select
1996 6-8: Base I/O Address Select
1997 SW2 1-8: Node ID Select
1998 SW3 1-5: IRQ Select
1999 6-7: Extra Timeout
2008 The eight switches in SW3 are used to set the node ID. Each node attached
2009 to the network must have an unique node ID which must not be 0.
2010 Switch 1 serves as the least significant bit (LSB).
2012 Setting one of the switches to Off means "1", On means "0".
2014 The node ID is the sum of the values of all switches set to "1"
2018 -------|-------
2019 1 | 1
2032 The last three switches in switch block SW1 are used to select one
2038 ------------|--------
2056 Jumpers 3-5 of switch block SW1 select the Memory Base address.
2061 1 2 3 4 5 | Address | Address *)
2062 --------------------|---------|-----------
2072 *) To enable the Boot ROM set the switch 8 of switch block SW3 to position ON.
2074 The switches 1 and 2 probably add 0x0800 and 0x1000 to RAM base address.
2080 Switches 1-5 of the switch block SW3 control the IRQ level::
2083 1 2 3 4 5 |
2084 ----------------------------
2095 The switches 6-7 of the switch block SW3 are used to determine the timeout
2102 8-bit card, TA-ARC/10
2103 ---------------------
2105 - from Vojtech Pavlik <vojtech@suse.cz>
2118 | |___________| 1 2 |
2122 | > EPROM SOCKET | | \ |------|
2141 SW1 1-5 Base Memory Address Select
2142 6-8 Base I/O Address Select
2143 SW2 1-8 Node ID Select (ID0-ID7)
2155 The eight switches in SW2 are used to set the node ID. Each node attached to
2156 the network must have an unique node ID which must not be 0. Switch 1 (ID0)
2159 Setting one of the switches to Off means "1", On means "0".
2161 The node ID is the sum of the values of all switches set to "1"
2165 -------|-------|-------
2166 1 | ID0 | 1
2178 The last three switches in switch block SW1 are used to select one
2184 ------------|--------
2202 Jumpers 3-5 of switch block SW1 select the Memory Base address.
2207 1 2 3 4 5 | Address | Address *)
2208 --------------------|---------|-----------
2218 *) To enable the Boot ROM short the jumper J2.
2220 The jumpers 1 and 2 probably add 0x0800 and 0x1000 to RAM address.
2226 Jumpers 1-5 of the jumper block J1 control the IRQ level. ON means
2230 1 2 3 4 5 |
2231 ----------------------------
2242 The jumpers J3 are used to set the timeout parameters. These two
2245 Thomas-Conrad
2248 Model #500-6242-0097 REV A (8-bit card)
2249 ---------------------------------------
2251 - from Lars Karlsson <100617.3473@compuserve.com>
2259 | SW 3 SW 1 | |
2267 | Jumper- _____| Connector
2273 | |...........| | RJ-jack
2276 | Boot PROM socket IRQ-jumpers |_ Diagnostic
2289 1 2 3 4 5 6 7 8
2291 2E0----- 0 0 0 1 0 0 0 1
2292 2F0----- 0 0 0 1 0 0 0 0
2293 300----- 0 0 0 0 1 1 1 1
2294 350----- 0 0 0 0 1 1 1 0
2296 "0" in the above example means switch is off "1" means that it is on.
2302 1 2 3 4 5 6 7 8
2304 CX00--0 0 1 1 | | |
2305 DX00--0 0 1 0 |
2306 X000--------- 1 1 |
2307 X400--------- 1 0 |
2308 X800--------- 0 1 |
2309 XC00--------- 0 0
2310 ENHANCED----------- 1
2311 COMPATIBLE--------- 0
2323 There is a DIP-switch with 8 switches, used to set the shared memory address
2324 to be used. The first 6 switches set the address, the 7th doesn't have any
2325 function, and the 8th switch is used to select "compatible" or "enhanced".
2326 When I got my two cards, one of them had this switch set to "enhanced". That
2328 card had this switch set to "compatible" and it behaved absolutely normally. I
2335 varies by the type of card involved. I fail to see how either of these
2342 8-bit card (C) 1985
2343 -------------------
2344 - from Robert Michael Best <rmb117@cs.usask.ca>
2347 SEEM to have settings similar to the PDI508Plus, which is
2348 software-configured and doesn't work with my driver either. The "Waterloo
2351 e-mail me.]
2353 The probe has not been able to detect the card on any of the J2 settings,
2361 | -- -- |_| | 5 || || | C3 |
2364 | -- -- | \/ || | |
2369 | | || | -- | BNC |___|
2372 | __ __ |____||_____| 1 2 3 6 |
2383 C1 -- "COM9026
2387 C2 -- "@Copyright
2393 C3 -- "COM9032
2397 C4 -- "74LS"
2400 M5 -- "50006-136
2402 MTQ-T1-S3
2403 0 M-TRON 86-40"
2406 C6 -- "MOSTEK@TC8643
2407 MK6116N-20
2411 C7 -- No stamp or label but in a 20 pin chip socket.
2413 C8 -- "PAL10L8CN
2417 C9 -- "PAl16R4A-2CN
2421 C10 -- "M8640
2426 ?? -- Some components on a smaller board and attached with 20 pins all
2427 along the side closest to the BNC connector. The are coated in a dark
2436 J2 -- Numbered 1 2 3 4 5 6.
2437 4 and 5 are not stamped due to solder points.
2439 J3 -- IRQ 2 3 4 5 6 7
2442 and "-2 46-86" beside C2. Between C1 and C6 "ASS 'Y 300163" and "@1986
2449 8-bit cards, 16-bit cards
2450 -------------------------
2452 - from Juergen Seifert <seifert@htwm.de>
2456 hint to the existence of a manufacturer at all is written in copper,
2478 | |__________-__________| |
2483 | |_______________| 1 2 3 4 5 6 7 8 1 2 3 4 5 6 7 8 |
2494 S1 1-8: Node ID Select
2495 S2 1-3: I/O Base Address Select
2496 4-6: Memory Base Address Select
2497 7-8: RAM Offset Select
2504 Setting one of the switches to Off means "1", On means "0".
2510 The eight switches in group SW1 are used to set the node ID.
2511 Each node attached to the network must have an unique node ID which
2515 The node ID is the sum of the values of all switches set to "1"
2519 -------|-------
2520 8 | 1
2527 1 | 128
2532 1 2 3 4 5 6 7 8 | Node ID | Node ID
2533 ----------------|---------|---------
2535 0 0 0 0 0 0 0 1 | 1 | 1
2536 0 0 0 0 0 0 1 0 | 2 | 2
2537 0 0 0 0 0 0 1 1 | 3 | 3
2539 0 1 0 1 0 1 0 1 | 55 | 85
2541 1 0 1 0 1 0 1 0 | AA | 170
2543 1 1 1 1 1 1 0 1 | FD | 253
2544 1 1 1 1 1 1 1 0 | FE | 254
2545 1 1 1 1 1 1 1 1 | FF | 255
2551 The first three switches in switch group SW2 are used to select one
2555 1 2 3 | Address
2556 ------------|--------
2572 Switches 4-6 of switch group SW2 select the Base of the 16K block.
2580 -----------|---------|-----------
2582 0 0 0 0 1 | C0800 | C2000
2583 0 0 0 1 0 | C1000 | C2000
2584 0 0 0 1 1 | C1800 | C2000
2586 0 0 1 0 0 | C4000 | C6000
2587 0 0 1 0 1 | C4800 | C6000
2588 0 0 1 1 0 | C5000 | C6000
2589 0 0 1 1 1 | C5800 | C6000
2591 0 1 0 0 0 | CC000 | CE000
2592 0 1 0 0 1 | CC800 | CE000
2593 0 1 0 1 0 | CD000 | CE000
2594 0 1 0 1 1 | CD800 | CE000
2596 0 1 1 0 0 | D0000 | D2000 (Manufacturer's default)
2597 0 1 1 0 1 | D0800 | D2000
2598 0 1 1 1 0 | D1000 | D2000
2599 0 1 1 1 1 | D1800 | D2000
2601 1 0 0 0 0 | D4000 | D6000
2602 1 0 0 0 1 | D4800 | D6000
2603 1 0 0 1 0 | D5000 | D6000
2604 1 0 0 1 1 | D5800 | D6000
2606 1 0 1 0 0 | D8000 | DA000
2607 1 0 1 0 1 | D8800 | DA000
2608 1 0 1 1 0 | D9000 | DA000
2609 1 0 1 1 1 | D9800 | DA000
2611 1 1 0 0 0 | DC000 | DE000
2612 1 1 0 0 1 | DC800 | DE000
2613 1 1 0 1 0 | DD000 | DE000
2614 1 1 0 1 1 | DD800 | DE000
2616 1 1 1 0 0 | E0000 | E2000
2617 1 1 1 0 1 | E0800 | E2000
2618 1 1 1 1 0 | E1000 | E2000
2619 1 1 1 1 1 | E1800 | E2000
2621 *) To enable the 8K Boot PROM install the jumper ROM.
2628 To select a hardware interrupt level set one (only one!) of the jumpers
2635 The two jumpers labeled ET1 and ET2 are used to determine the timeout
2637 must be set to the same timeout values.
2642 --------|--------------------|--------------------------
2651 16-BIT ARCNET
2652 -------------
2654 The manual of my 8-Bit NONAME ARCnet Card contains another description
2655 of a 16-Bit Coax / Twisted Pair Card. This description is incomplete,
2657 of contents reports pages ... 2-9, 2-11, 2-12, 3-1, ... but inside
2658 the booklet there is a different way of counting ... 2-9, 2-10, A-1,
2659 (empty page), 3-1, ..., 3-18, A-1 (again), A-2)
2661 8-Bit card, because there isn't any letter like "SW1" written to the
2664 Should somebody have such a board, please feel free to complete this
2665 description or to send a mail to me!
2700 Setting one of the switches to Off means "1", On means "0".
2706 The eight switches in group SW2 are used to set the node ID.
2707 Each node attached to the network must have an unique node ID which
2711 The node ID is the sum of the values of all switches set to "1"
2715 -------|-------
2716 8 | 1
2723 1 | 128
2728 1 2 3 4 5 6 7 8 | Node ID | Node ID
2729 ----------------|---------|---------
2731 0 0 0 0 0 0 0 1 | 1 | 1
2732 0 0 0 0 0 0 1 0 | 2 | 2
2733 0 0 0 0 0 0 1 1 | 3 | 3
2735 0 1 0 1 0 1 0 1 | 55 | 85
2737 1 0 1 0 1 0 1 0 | AA | 170
2739 1 1 1 1 1 1 0 1 | FD | 253
2740 1 1 1 1 1 1 1 0 | FE | 254
2741 1 1 1 1 1 1 1 1 | FF | 255
2747 The first three switches in switch group SW1 are used to select one
2751 3 2 1 | Address
2752 ------------|--------
2768 Switches 6-8 of switch group SW1 select the Base of the 16K block.
2774 -----------|---------|-----------
2776 0 0 0 0 1 | C0800 | C2000
2777 0 0 0 1 0 | C1000 | C2000
2778 0 0 0 1 1 | C1800 | C2000
2780 0 0 1 0 0 | C4000 | C6000
2781 0 0 1 0 1 | C4800 | C6000
2782 0 0 1 1 0 | C5000 | C6000
2783 0 0 1 1 1 | C5800 | C6000
2785 0 1 0 0 0 | CC000 | CE000
2786 0 1 0 0 1 | CC800 | CE000
2787 0 1 0 1 0 | CD000 | CE000
2788 0 1 0 1 1 | CD800 | CE000
2790 0 1 1 0 0 | D0000 | D2000 (Manufacturer's default)
2791 0 1 1 0 1 | D0800 | D2000
2792 0 1 1 1 0 | D1000 | D2000
2793 0 1 1 1 1 | D1800 | D2000
2795 1 0 0 0 0 | D4000 | D6000
2796 1 0 0 0 1 | D4800 | D6000
2797 1 0 0 1 0 | D5000 | D6000
2798 1 0 0 1 1 | D5800 | D6000
2800 1 0 1 0 0 | D8000 | DA000
2801 1 0 1 0 1 | D8800 | DA000
2802 1 0 1 1 0 | D9000 | DA000
2803 1 0 1 1 1 | D9800 | DA000
2805 1 1 0 0 0 | DC000 | DE000
2806 1 1 0 0 1 | DC800 | DE000
2807 1 1 0 1 0 | DD000 | DE000
2808 1 1 0 1 1 | DD800 | DE000
2810 1 1 1 0 0 | E0000 | E2000
2811 1 1 1 0 1 | E0800 | E2000
2812 1 1 1 1 0 | E1000 | E2000
2813 1 1 1 1 1 | E1800 | E2000
2828 8-bit cards ("Made in Taiwan R.O.C.")
2829 -------------------------------------
2831 - from Vojtech Pavlik <vojtech@suse.cz>
2840 | 1 2 3 4 5 6 7 8 |
2855 | 1 2 3 4 5 6 7 8 | | | |___
2867 SW1 1-5: Base Memory Address Select
2868 6-8: Base I/O Address Select
2869 SW2 1-8: Node ID Select (ID0-ID7)
2870 SW3 1-5: IRQ Select
2871 6-7: Extra Timeout
2879 Setting the jumpers to ON means connecting the upper two pins, off the bottom
2880 two - or - in case of IRQ setting, connecting none of them at all.
2885 The eight switches in SW2 are used to set the node ID. Each node attached
2886 to the network must have an unique node ID which must not be 0.
2887 Switch 1 (ID0) serves as the least significant bit (LSB).
2889 Setting one of the switches to Off means "1", On means "0".
2891 The node ID is the sum of the values of all switches set to "1"
2895 -------|-------|-------
2896 1 | ID0 | 1
2908 8 7 6 5 4 3 2 1 | Node ID | Node ID
2909 ----------------|---------|---------
2911 0 0 0 0 0 0 0 1 | 1 | 1
2912 0 0 0 0 0 0 1 0 | 2 | 2
2913 0 0 0 0 0 0 1 1 | 3 | 3
2915 0 1 0 1 0 1 0 1 | 55 | 85
2917 1 0 1 0 1 0 1 0 | AA | 170
2919 1 1 1 1 1 1 0 1 | FD | 253
2920 1 1 1 1 1 1 1 0 | FE | 254
2921 1 1 1 1 1 1 1 1 | FF | 255
2927 The last three switches in switch block SW1 are used to select one
2933 ------------|--------
2951 Jumpers 3-5 of jumper block SW1 select the Memory Base address.
2956 1 2 3 4 5 | Address | Address *)
2957 --------------------|---------|-----------
2967 *) To enable the Boot ROM set the jumper 8 of jumper block SW3 to position ON.
2969 The jumpers 1 and 2 probably add 0x0800, 0x1000 and 0x1800 to RAM adders.
2974 Jumpers 1-5 of the jumper block SW3 control the IRQ level::
2977 1 2 3 4 5 |
2978 ----------------------------
2989 The jumpers 6-7 of the jumper block SW3 are used to determine the timeout
2995 --------------------
2996 - from Andrew J. Kroll <ag784@freenet.buffalo.edu>
2997 - Sorry this sat in my to-do box for so long, Andrew! (yikes - over a
3004 | .---'
3008 | | | 1 2 3 4 5 6 ___| |
3012 | 74LS373 | |- 5 | W | |
3013 | _________ | E |- 4 | | |
3014 | >_______| ______________|..... P |- 3 | 3 | |
3015 | | | : O |- 2 | | |
3016 | | | : X |- 1 |___| |
3017 | ________________ | | : Y |- | |
3018 | | SW1 | | SL90C65 | : |- | |
3019 | |________________| | | : B |- | |
3020 | 1 2 3 4 5 6 7 8 | | : O |- | |
3021 | |_________o____|..../ A |- _______| |
3022 | ____________________ | R |- | |------,
3023 | | | | D |- | BNC | # |
3024 | > 2764 PROM SOCKET | |__________|- |_______|------'
3026 | >________| <- 74LS245 | |
3036 SW1 1-5: IRQ Select
3040 SW2 1-3: Memory Buffer/PROM Address
3041 3-6: I/O Address Map
3042 SW3 1-8: Node ID Select
3050 To select a hardware interrupt level set one (only one!) of the dip switches
3051 up (on) SW1...(switches 1-5)
3055 are used to determine the timeout parameters. These two dip switches
3058 To enable the 8K Boot PROM position SW1 switch 8 on (UP) labeled ROM.
3065 The last three switches in switch group SW2 are used to select one
3071 -------|--------
3073 0 0 1 | 290
3074 0 1 0 | 2E0 (Manufacturer's default)
3075 0 1 1 | 2F0
3076 1 0 0 | 300
3077 1 0 1 | 350
3078 1 1 0 | 380
3079 1 1 1 | 3E0
3087 Switches 1-3 of switch group SW2 select the Base of the 16K block.
3088 (0 = DOWN, 1 = UP)
3095 1 2 3 | Address | Address
3096 ------|---------|-----------
3098 0 0 1 | D0000 | D2000 (Manufacturer's default)
3099 0 1 0 | ????? | ?????
3100 0 1 1 | ????? | ?????
3101 1 0 0 | ????? | ?????
3102 1 0 1 | ????? | ?????
3103 1 1 0 | ????? | ?????
3104 1 1 1 | ????? | ?????
3110 The eight switches in group SW3 are used to set the node ID.
3111 Each node attached to the network must have an unique node ID which
3113 Switch 1 serves as the least significant bit (LSB).
3114 switches in the DOWN position are OFF (0) and in the UP position are ON (1)
3116 The node ID is the sum of the values of all switches set to "1"
3120 -------|-------
3121 1 | 1
3133 8 7 6 5 4 3 2 1 | Node ID | Node ID
3134 ----------------|---------|---------
3135 0 0 0 0 0 0 0 0 | not allowed <-.
3136 0 0 0 0 0 0 0 1 | 1 | 1 |
3137 0 0 0 0 0 0 1 0 | 2 | 2 |
3138 0 0 0 0 0 0 1 1 | 3 | 3 |
3140 0 1 0 1 0 1 0 1 | 55 | 85 |
3142 1 0 1 0 1 0 1 0 | AA | 170 |
3144 1 1 1 1 1 1 0 1 | FD | 253 |
3145 1 1 1 1 1 1 1 0 | FE | 254 |
3146 1 1 1 1 1 1 1 1 | FF | 255 <-'
3153 ---------------
3155 - from Christoph Lameter <christoph@lameter.com>
3161 ----------------------------------------------- tiara
3164 +----------------------------------------------+
3166 ! +------------------+ -------
3168 ! ROM 7654321 <- I/O -------
3169 ! : : +--------+ !
3171 ! : : ! ! !D Switch to set
3173 ! : : +--------+ !P
3175 ! 234567 <- IRQ !
3176 +------------!!!!!!!!!!!!!!!!!!!!!!!!--------+
3179 - 0 = Jumper Installed
3180 - 1 = Open
3230 send any and all info to: